Vicfred · July 1, 2025 07:49 · Jul 1, 2025 · Jul 1, 2025 · Jun 30, 2025 · Jun 30, 2025
diff --git a/qemu_kvm_make_conf.md b/qemu_kvm_make_conf.md
@@ -1,3 +1,6 @@
+> no need separate /boot partition for BIOS on qemu
+> EFI requires extra work to configure on qemu, BIOS is enough
+
 `/etc/portage/make.conf`
 ```bash
 #------------------------------------------------------------------------------
@@ -30,6 +33,72 @@ USE="$USE -bindist -ipv6 -libtirpc -man -multilib -systemd -test-rust -wayland -
 
 GENTOO_MIRRORS="https://mirror.rackspace.com/gentoo/"
 ```
+> things to consider in the kernel configuration
+> ARCH=x86_64 make defconfig
+- General setup
+    - Default hostname
+    - Kernel .config support
+    - Initial RAM filesystem and RAM disk (initramfs/initrd) support
+    - Profiling support
+- Processor type and features
+    - `Disable either everything Intel or everything AMD`
+    - Support for extended (non-PC) x86 platforms
+    - Linux guest support
+    - EFI runtime service support
+- Power management and ACPI options
+    - Suspend to RAM and standby
+    - Hibernation (aka 'suspend to disk')
+- Binary Emulations
+    - IA32 Emulation
+- Virtualization
+- Enable loadable module support
+- Networking support
+    - Networking options
+        - The IPv6 protocol
+    - Wireless `to disable you must disable the driver first`
+- Device Drivers
+    - PCCard (PCMCIA/CardBus) support
+    - Misc devices
+    - SCSI device support `disable everything you can`
+    - Serial ATA and Parallel ATA drivers (libata)
+    - Multiple devices driver support (RAID and LVM)
+    - Macintosh device drivers
+    - Network device support
+        - Virtio network driver `this is enough for qemu, dont need the ethernet one`
+        - Ethernet driver support
+        - USB Network Adapters
+        - Wireless LAN
+    - Input device support
+        - Mouse interface
+        - Joystick interface
+        - Keyboards `you can disable this if you only ssh but keyboard stops working in the vm directly`
+        - Mice
+        - Joysticks/Gamepads
+        - Tablets
+        - Touchscreens
+        - Miscellaneous devices
+        - Graphics support
+        - Sound card support
+        - HID bus support
+        - USB support
+        - Microsoft Surface Platform-Specific Device Drivers
+        - X86 Platform Specific Device Drivers
+        - IOMMU Hardware Support
+    - File systems
+        - `Enable the necesary ones like ext4, btrfs as needed`
+        - CD-ROM/DVD Filesystems
+        - DOS/FAT/EXFAT/NT Filesystems
+        - Pseudo filesystems `give a check here`
+        - Miscellaneous filesystems
+        - Network File Systems
+    - Kernel hacking
+        - Kernel debugging
+        - Generic Kernel Debugging Instruments
+            - Magic SysRq key
+            - Debug Filesystem
+        - Tracers
+        - Remote debugging over FireWire early on boot
+
 `/etc/default/grub`
 ```bash
 GRUB_TIMEOUT_STYLE=hidden

diff --git a/qemu_kvm_make_conf.md b/qemu_kvm_make_conf.md
@@ -1,3 +1,4 @@
+`/etc/portage/make.conf`
 ```bash
 #------------------------------------------------------------------------------
 # CPU & optimization flags
@@ -28,4 +29,23 @@ USE="$USE udev"
 USE="$USE -bindist -ipv6 -libtirpc -man -multilib -systemd -test-rust -wayland -X"
 
 GENTOO_MIRRORS="https://mirror.rackspace.com/gentoo/"
+```
+`/etc/default/grub`
+```bash
+GRUB_TIMEOUT_STYLE=hidden
+GRUB_TIMEOUT=0
+GRUB_HIDDEN_TIMEOUT=0
+GRUB_HIDDEN_TIMEOUT_QUIET=true
+```
+`/etc/inittab`
+> comment all unneeded
+```bash
+# TERMINALS
+#x1:12345:respawn:/sbin/agetty 38400 console linux
+c1:12345:respawn:/sbin/agetty --noclear 38400 tty1 linux
+#c2:2345:respawn:/sbin/agetty 38400 tty2 linux
+#c3:2345:respawn:/sbin/agetty 38400 tty3 linux
+#c4:2345:respawn:/sbin/agetty 38400 tty4 linux
+#c5:2345:respawn:/sbin/agetty 38400 tty5 linux
+#c6:2345:respawn:/sbin/agetty 38400 tty6 linux
 ```
diff --git a/qemu_kvm_make_conf.md b/qemu_kvm_make_conf.md
@@ -20,6 +20,7 @@ LC_MESSAGES=C.utf8
 ACCEPT_KEYWORDS="amd64"
 ACCEPT_LICENSE="*"
 
+# qemu uses BIOS by default, EFI requires extra configuration.
 GRUB_PLATFORMS="pc"
 
 # Check active USE flags with `emerge --info`.

diff --git a/qemu_kvm_make_conf.md b/qemu_kvm_make_conf.md
@@ -0,0 +1,30 @@
+```bash
+#------------------------------------------------------------------------------
+# CPU & optimization flags
+#------------------------------------------------------------------------------
+# march=znver4      → tune for AMD Zen 4 (Ryzen 7000 series)
+# O2                → safe optimization level
+# pipe              → use pipes rather than temp files
+# fstack-protector-strong → lightweight stack smashing protection
+# fomit-frame-pointer    → omit frame pointers for a bit more speed
+COMMON_FLAGS="-march=native -O2 -pipe -fstack-protector-strong -fomit-frame-pointer"
+CFLAGS="${COMMON_FLAGS}"
+CXXFLAGS="${COMMON_FLAGS}"
+FCFLAGS="${COMMON_FLAGS}"
+FFLAGS="${COMMON_FLAGS}"
+MAKEOPTS="-j31 -l16"
+
+ABI_X86="64"
+LC_MESSAGES=C.utf8
+
+ACCEPT_KEYWORDS="amd64"
+ACCEPT_LICENSE="*"
+
+GRUB_PLATFORMS="pc"
+
+# Check active USE flags with `emerge --info`.
+USE="$USE udev"
+USE="$USE -bindist -ipv6 -libtirpc -man -multilib -systemd -test-rust -wayland -X"
+
+GENTOO_MIRRORS="https://mirror.rackspace.com/gentoo/"
+```